Adjustable stroke dispensing pump



y 27, 1952 E. D. MINTON 2,598,188

ADJUSTABLE STROKE DISPENSING PUMP Filed July 1, 1947 :5 Sheets-Sheet 1 ZLD. 7)Ii7zZa7z/ INVENTOR ATTORNEYS.

y 1952 E. D. Ml'NTON 2,598,188

ADJUSTABLE STR KE DISPENSING PUMP Filed July 1, 1947 s Sheets-Sheet 2 2/- E /7\ A? 24 g i j 7.; 4* J W J .ZLDJUinZarz INVENTOR ATTORNEYS y 27, 1952 I E. p. MlNTON 2,598,188

ADJUSTABLE STROKE DISPENSING PUMP Filed July 1, 1947 5 Sheets-Sheet 3 1;. $.Mimion INVENTOR ATTORNEYS.

Patented May 27, 1952 -UNITED STATES This invention relates to vendingr. machines,

= and more ---particularly to.- yen'ding machines. de-

signed for vending a predetermined quantity of liquid with each operation of the machine.

An important object of the invention is to provide means including a check-controlled apparatus which is connected with a plunger in such a way that the liquid will be forced through the discharge spout of the apparatus, with each operation of the plunger.

A further object of the invention is to provide means whereby the quantity of liquid dispensed by the machine may be regulated, thereby adapting the device for use in vending various grades of liquor for a given cost.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts, hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawings Figure 1 is an elevational view of a liquid vending machine, constructed in accordance with the invention.

Figure 2 is a longitudinal sectional view through the machine.

Figure 3 is a sectional view taken on line 3-3 of Figure 2.

Figure 4 is a sectional view taken on line 4-4 of Figure 2.

Figure 5 is a sectional view taken on line 5-5 of Figure 2.

Referring to the drawings in detail, the reference character 5 indicates generally the casing or housing, in which the apparatus is contained. As shown, the housing is provided with a compartment 6 that receives coins from the coin chute I, the compartment 6 having an opening normally closed by means of the closure 8, whereby the coins may be removed therefrom.

The coin-control mechanism comprises a conventional slide member 9 formed with an opening III to accommodate the coin or check used in operating the device.

The reference character II indicates the spring finger which moves over the surface of the slide 9 and moves into the opening II), as the slide 9 moves thereunder, restricting downward movement of the slide to operate the mechanism. When a coin is inserted in the opening,

I 0, it is obvious that the spring finger I I will ride liClaim- (Cl. 222-173) V-ov r; ecminzandial owst er lidesit o a -:,l l 9 1 em ra ezt erelvnga -i hscdev in dispensing a predetermined quantity of liquid from the machine.

The reference character I2 indicates a spring finger which is adapted to extend into the opening I0, and force the coin from the opening, as the coin moves under the spring finger. The coin then passes through the chute I and falls into the compartment 6.

The reference character I3 indicates the tank in which the liquid dispensed is contained, and this tank is provided with an opening which is closed by the cap I4 which is formed with a central opening in which the coiled spring I5 is mounted, the coiled spring being also connected to the plunger rod I6 that moves through an opening in the cap, the lower end of the plunger rod, carrying the plunger I! that moves into the chamber I8 supported within the tank I3. A rod I9 connects the chamber I8 with the cap I4 and supports the chamber I8 in spaced relation with the bottom of the tank I3. The chamber I8 is formed with an inlet opening which is normally closed by means of the valve 20 that opens inwardly. A discharge pipe 2| extends into the chamber I8 and terminates adjacent to the bottom thereof, so that when the plunger I'I moves downwardly within the chamber I8, the liquid in the chamber I8 will be forced upwardly through the discharge pipe 2I and into the nozzle 22 to be discharged through the spout 23 into a glass or other receptacle positioned on the shelf 24 direotly under the spout 23.

The upper end of the plunger rod I I5 is threaded as at 25 and is positioned in the threaded bore extending inwardly from one end of the coupling 26 that is secured to the lower end of the slide 9, by means of the bolts 21. Due to this construction, it is obvious that by rotating the plunger rod, an adjustment between the slide 9 and plunger rod may be made to vary the quantity of liquid dispensed with each operation of the plunger I1 and rod I6 connected therewith.

It will, of course, be understood that the coiled spring I5 operates to return the plunger and plunger rod to their normal positions, after they have been depressed to dispense a quantity of liquid therefrom.

It will further be seen that upon upward movement of the plunger IT, by the action of the spring I5, the quantity of liquid to be dispensed by the next operation of the plunger. will be drawn into the chamber I8.

In the operation of the device, a coin is inserted in the coin opening it], and the slide 9 is now forced downwardly which results in the plunger i1 moving to the bottom of the chamber l8. As the plunger moves downwardly, the liquid within the chamber I8 is forced upwardly through the pipe 2! and nozzle 22 where it discharges through the spout 23.

What is claimed is:

In a liquid vending machine, a housing, a liquid tank assembly mounted within the housing, a cap including a nozzle and spout closing the upper end thereof, a chamber within the tank into which liquid flows from the tank, a rod connected between the cap and chamber, the lower end of the rod providing a stop, a pipe connected with the nozzle, extending into the chamher through which liquid passes to the nozzle from the chamber, a plunger operating within the chamber forcing a quantity of liquid from the chamber, the lower end of said rod providing a stop limiting the upward movement of the plunger in said chamber, a plunger operating ERNEST D. MINTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Snediker Nov. 23, 1909 Stewart Mar. 1'1, 1930 Hefifner June 13, 1933 Sweitzer Jan. 11, 1938 Number 

